The team led byJunjiu Huang at Sun Yat-Sen Universityattempted to modify the gene HBB responsible for β-thalassemia, using CRISPR/Cas9. HBB encodes the β-globin protein. Mutations in the gene are responsible for β-thalassemia.
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Researchers in China have reported editing the genes of human embryos to try to make them resistant to HIV infection, published in J Assist Reprod Genet (2018) used CRISPR-editing tools in non-viable embryos that were destroyed after 3 days.
A. 对
B. 错
当地下室顶板是框架柱的嵌固部位时,则地下室顶板以下部分的柱端箍筋( )。
A. 应加密
B. 不加密
C. 不仅加密而且加密区长度应扩大
D. 只要放一道箍筋即可
板内纵向钢筋采用绑扎搭接连接时,接头处钢筋又以是非接触方式,但搭接部位钢筋净距不宜小于( )。
A. 30
B. 60
C. 10
D. 20
梁平法施工图可采用()表达。
A. 列表注写方式或平面注写方式
B. 列表注写方式或截面注写方式
C. 平面注写方式或截面注写方式
D. 列表注写方式或平面注写方式或截面注写方式